Gun muzzle attachment device for counteracting recoil



C- H- LEE Sept. 28, 1965 GUN MUZZLE ATTACHMENT DEVICE FOR COUNTERACTING RECOIL Filed 001:. 12, 1964 Fig.

1N VENTOR. CLARENCE LEE,

A 7 TOEWE Y.

United States Patent 3,208,348 GUN MUZZLE ATTACHMENT DEVICE FOR COUNTERA'CTING RECOIL Clarence H. Lee, 4725 W. 160th St., Lawndale, Calif. Filed Oct. 12, 1964, Ser. No. 403,279 12 Claims. (Cl. 89-14) This invention relates to a gun muzzle attachment device and more particularly to such a device for lessening the noise, kick and jump associated with the firing of a gun.

The noise, kick and jump associated with the firing of a gun is not only discomforting to the shooter but also often lessens the accuracy of the shot. This problem becomes particularly significant with shotguns which have considerable kick, jump and noise with firing, especially where high velocity ammunition is utilized. Various means have been tried in the prior art to solve this problem. These techniques generally involve the use of attachment devices having vents or apertures therein which are used to control the escape of the gas generated in the firing of the gun. These devices, while they may have some effect in reducing noise and gun blast, have little effect in reducing jump or kick.

The device of this invention provides simple yet highly effective means for counteracting the effects of gun recoil and at the same time lessens the noise incidental to firing. This end result is achieved in the device of the invention by providing an outer tube member, having an inner tube member slidably mounted therein. The outer tube memher is removably attached to the barrel of the gun, and spring means are provided for urging the inner tube member towards the gun barrel. The inner tube member includes a larger diameter first portion which fits snugly into the outer tube member and is urged against the end of the gun barrel by the spring means, and a second portion having a lesser diameter which protrudes out from the end of the outer tube member away from the barrel. When .the gun is fired, the inner tube member is urged forward by the expanding gases. When it finally reaches the end of its travel with the full compression of the spring means, it is returned to its original position by such spring means. The outer tube member has apertures or ports formed therein which are progressively uncovered to permit the escape of gas as the inner tube member moves forward.

3,298,348 Patented Sept. 28, 1965 effects of gun recoil and muzzle blast, having a choke unit which is readily replaceable for obtaining different shot patterns with a shotgun.

It is still a further object of this invention to provide a gun muzzle attachment device of relatively simple construction which aids in improving shooting effectiveness.

Other objects of this inventon will become apparent from the following description taken in connection with the accompanying drawings of which,

FIG. 1 is a cross sectional view of a first embodiment of the device of the invention, and

FIG. 2 is an exploded view of the embodiment of the invention shown in FIG. 1.

Referring now to the figures, end portion 12 of outer tube member 11 is threaded around its inside wall. Threaded end portion 12 threadably engages gun muzzle 14 and is detachable therefrom. Outer tube member 11 has several elongated longitudinally extending ports or apertures 15 formed in the top wall portions thereof near end portion 12. End ring 16 is threadably attached to outer tube 11 to form an end holder piece. Slidably mounted within outer tube 11 is inner tube member 20. Inner tube member 20 includes a first portion 21 having a large outside diameter, the inner walls of which are conically shaped to form a forcing cone, and a second portion 25 having a smaller outside diameter, the inner walls of which form a straight cylinder. The conical inner walls of tube portion 21 act like a Venturi tube to speed up the velocity of the driving gas and .the shot as they pass into portion 25. The tube portion 21 has ring-like grooves 22 formed therein which help to scrape powder particles and the like which may accumulate on the inside of tube portion 11.

Coil spring 27 fits over tube portion 25 in external concentricity therewith, with one end thereof abutting against end wall 30 of tube portion 21 and the other end thereof abutting against end wall 19 of holder piece 16. The end wall 33 of tube portion 21 is flush with the end of muzzle 14.

When the gun is fired, the gases which travel down the gun barrel force inner tube member 20 forward, compressing spring 27. As inner tube portion 21 moves forward, it gradually uncovers apertures 15, permitting gas to escape therefrom. Finally, tube member 20 reaches The forward motion of the inner tube member has two effects: (1) The inner tube when it reaches the end of its travel imparts a force to the gun muzzle which tends to counteract the jump and kick effects of recoil. (2) Such forward motion gradually uncovers the gas escape ports and thus permits a gradual escape of gas which tends to minimize the effects of gun blast and muzzle jump. The inner tube member is completely removable and includes both a forcing cone and a choke. Various such inner tube units can therefore be substituted to achieve any desired shotgun firing pattern.

It is therefore an object of this invention to provide an improved gun muzzle attachment device.

-It is a further object of this invention to provide a gun muzzle attachment device which lessens the adverse effects of recoil and muzzle blast.

It is still another object of this invention to provide a gun muzzle attachment device which lessens the adverse the end of its travel with the full compression of spring member 27. Spring member 27 then returns the tube member to its original resting position (as shown in FIG. 1). Spring member 27 is preferably chosen to provide suflicient force to return tube member 20 to its initial position but so that it ofifers as little resistance as possible to the forward motion of the tube commensurate with achieving proper return of the tube member. Thus, tube 21 reaches the end of its travel in a relatively short period of time and imparts a considerable forward force on the end of the gun barrel. This force tends to counteract the elfects of recoil.

Apertures 15 are preferably set so that they are facing upwardly when the gun is fired, thereby releasing the gases upwardly. This release of gases not only tends to diminish the firing noise but also provides some counteraction to gun jump. Spring 27 is preferably made rectangular rather than round in cross section to minimize the possibility of the coils of .the spring overlapping each other and becoming jammed with firing.

Inner tube member 20, with its choke section 25 and forcing cone section 21, can be made to various lengths and inside diameters to provide different firing patterns. This unit can readily be changed in the field by removing end piece 16 from outer tube 11, or by removing outer tube .11 from muzzle 14.

While the device of the invention has been described and illustrated in detail, it is to be clearly understood that this is intended by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of this invention being limited only by the terms of the following claims.

I claim:

1. A gun muzzle attachment comprising an outer tube member including means formed in one end thereof for removably attaching said member to a gun muzzle, end holder means attached to the other end thereof,

inner tube member means for counteracting the effects of gun recoil slidably mounted in said outer tube member, said inner tube member means including a first portion having conically shaped inner Walls and a second portion having a substantially smaller outside diameter than said first portion with cylindrically shaped inner walls, said inner walls forming the innermost walls of said attachment, said first portion being proximate to said one end of said outer tube member, and

means for resiliently urging said inner tube member towards the gun muzzle,

whereby when the gun is fired said inner tube member means is urged forward to compress said urging means and provides a forward force on the gun to counteract the effects of recoil.

2. The gun muzzle attachment as recited in claim 1 wherein said outer tube member has a plurality of longitudinal apertures formed in the walls thereof near said one end.

3. The gun muzzle attachment as recited in claim 1 wherein said means for resiliently urging said inner tube member comprises a coil spring mounted in external concentricity with the second portion of said inner tube member.

4. A gun muzzle attachment comprising an outer tube member including means formed in one end thereof for removably attaching said member to a gun muzzle, end holder means removabl attached to the other end thereof, and aperture means formed in the wall portions thereof near said one end,

inner tube member means for counteracting the effects of gun recoil slidably mounted in said outer tube member, said inner tube member means including a first portion having conically shaped inner Walls and and a second portion having a substantially smaller outside diameter than said first portion with cylindrically shaped inner walls, said inner walls forming the innermost walls of said attachment, said first portion being proximate to said one end of said outer tube member, and

spring means for urging said inner tube member means towards the gun muzzle,

whereby when the gun is fired said inner tube member means is urged forward to compress said spring means and provide a forward force on the gun to counteract the effects of recoil.

5. The device as recited in claim 4 wherein said aperture means includes at least one elongated slot, said slot being progressively connected to vent the gun muzzle as said inner tube member means moves forward.

6. The device as recited in claim 5 wherein said spring means comprises a coiled spring mounted in external concentricity with the second portion of said inner tube member means, one end of said spring abutting against said end holder means, the other end of said spring abutting against an end wall of the first portion of said inner tube member means.

7. The device as recited in claim 6 wherein said coiled spring has a rectangular cross section.

8. The device as recited in claim 4 wherein said attaching means formed in one end of said outer tube member is a threaded section in the inner wall of said outer tube member.

9. In combination, a gun and an attachment for the muzzle thereof comprising an outer cylindrical tube member, one end of said memher being threadably attached to the gun muzzle, aperture means being formed in the wall of said member proximate to said one end thereof,

an end holder piece member having a threaded portion threadably attached to the other end portion of said outer tube member, the threaded portion of said holder piece member being in internal concentricity with said outer tube member,

inner tube member means slidably mounted in said outer tube member, said inner tube member means including a first portion having conically shaped inner walls, the outside walls of said first portion being substantially cylindrically shaped and fitting snugly within said outer tube member and a second portion having a substantially smaller outside diameter than said first portion, the inner walls of said second portion being substantially cylindrically shaped, the inner walls of said first and second portions forming the innermost walls of said attachment, said first portion being proximate to said one end portion of said outer tube member, and

spring means for urging said inner tube member means towards said muzzle, said spring means being mounted in external concentricity with the second portion of said inner tube member means,

whereby when the gun is fired, said inner tube member means is driven forward to progressively release gases through said aperture means and to provide a forward force on said gun to counteract the effects of recoil.

10. The combination as recited in claim 9 wherein said aperture means includes a plurality of elongated longitudinally extending ports.

11. The combination as recited in claim 9 wherein the first portion of said inner tube member means has a plurality of ring-like grooves formed in the outer wall thereof.

12. In combination, a gun and an attachment for the muzzle thereof comprising an outer cylindrical tube member, one end portion of the inner wall of said member being threaded, a plurality of elongated longitudinally extending apertures being formed in the wall of said member proximate to said one end portion thereof, said one end portion being threadably attached to said gun muzzle,

an end holder piece member having a threaded portion threadably attached to the other end portion of said outer tube member, the threaded portion of said holder piece member being in internal concentricity with said outer tube member,

inner tube member means for counteracting the effects of gun recoil slidably mounted in said outer tube member, said inner tube member means including a first portion having conically shaped inner Walls, the outside walls of said first portion being substantially cylindrically shaped and fitting snugly within said outer tube member and a second portion having a substantially smaller outside diameter than said first portion, the inner walls of said second portion being substantially cylindrically shaped, the inner walls of said first and second portions forming the innermost walls of said attachment, said first portion being proximate to said one end portion of said outer tube member, and

a coiled spring having a rectangular cross section, said coiled spring being mounted in external concentricity with the second portion of said inner tube member with one end thereof abutting against the inwardly facing end of said holder piece and the other end thereof abutting against the inwardly facing end of said first portion of said inner tube member means,

whereby when the gun is fired, said inner tube member means is driven forward to progressively release gases 6 References Cited by the Examiner UNITED STATES PATENTS 2,484,988 10/49 Finlay 4279 2,512,850 6/ 50 Crandall 42-79 2,869,272 1/59 Coyl 42-79 3,156,061 11/64 Evans 41-79 SAMUEL FEINBERG, Primary Examiner.

through said apertures and to provide a forward 10 BENJAMIN BORCHELT, Examiner.

force on said gun to counteract the effects of recoil. 

1. A GUN MUZZLE ATTACHMENT COMPRISING AN OUTER TUBE MEMBER INCLUDING MEANS FORMED IN ONE END THEREOF FOR REMOVABLY ATTACHING SAID MEMBER TO A GUN MUZZLE, END HOLDER MEANS ATTACHED TO THE OTHER END THEREOF, INNER TUBE MEMBER MEANS FOR COUNTERACTING THE EFFECTS OF GUN RECOIL SLIDABLE MOUNTED IN SAID OUTER TUBE MEMBER, SAID INNER TUBE MEMBER MEANS INCLUDING A FIRST PORTION HAVING CONICALLY SHAPED INNER WALLS AND A SECOND PORTION HAVING A SUBSTANTIALLY SMALLER OUTSIDE DIAMETER THAN SAID FIRST PORTION WITH CYLINDRICALLY SHAPED INNER WALLS, SAID INNER WALLS FORMING THE INNERMOST WALLS OF SAID ATTACHMENT, SAID FIRST PORTION BEING PROXIMATE TO SAID ONE END OF SAID OUTER TUBE MEMBER, AND MEANS FOR RESILIENTLY URGING SAID INNER TUBE MEMBER TOWARDS THE GUN MUZZLE, WHEREBY WHEN THE GUN IS FIRED SAID INNER TUBE MEMBER MEANS IS URGED FORWARD TO COMPRESS SAID URGING MEANS AND PROVIDES A FORWARD FORCE ON THE GUN TO COUNTERACT THE EFFECTS OF RECOIL. 